There are two main approaches to subject classification currently being explored for future use in DITA, which this page will call the map-based approach and the metadata approach.

In the map-based approach, a taxonomy is represented using a hierarchy in a DITA map. Each member of the hierarchy is a specialization of the <topicref> element. Each <topicref> element points to a topic that describes the subject of that node of the taxonomy.

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A plug-in for the DITA toolkit that enables a taxonomy specialization is available for download at sourceforge.net. Although the plug-in is somewhat experimental, it is being used, and merits mention here.

The URL to access the plug-in is:

http://sourceforge.net/project/showfiles.php?group_id=132728

Here are some simple notes on how to retrieve and install the plug-in.

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